I noticed this a few days ago but didn’t think too much of it at the time but seeing it again and again I thought I’d raise it.
Using my mobile to browse our hosted solution and meta, if I scroll down on the categories view it seems to be a bit jittery, almost bounce. I initially thought this might be some kind of delay loading the content as I scrolled down, but it seems to do it when I scroll back up also.
I am scrolling fairly swiftly but still at a readable pace. Galaxy S6 if it is of any help.